Directories with umlauts not supported
I tried to use the directory zip function on a directory containing an umlaut in its name. After some research I figured out the source of the problem: The function escapeshellarg(), which is used several times in class.tx_kbpackman.php, did remove the umlaut from the name before the zip command is called.
before escapeshellarg() helped.
I guess this might also be a problem for users of other languages that contain extra characters. Maybe this could be a new feature, the possibility to add a locale setting?